Huawei y520-u22 tested firmware and trick

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first flash with this file MT6572__HUAWEI__HUAWEI Y520-U22__HWY520-U__4.4.2__ALPS.KK1.MP6.V1 - Download - 4shared - Ali Jan 

if display problam then flash with this file Y520-U22 Dispaly Error Fix OK - Download - 4shared - ali shams